Cardfight!! Vanguard TCG - Flail Seeker, Isbuzzard (BT16/030EN) - Booster Set 16: Legion of Dragons & Blades ver.E A single individual card from the Cardfight!! Vanguard trading and collectible card game (TCG/CCG). This is of R rarity. From the Booster Set 16: Legion of Dragons & Blades ver.E set.